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Calendar Year 2004 Groundwater Monitoring Report, U.S. Department of Energy Y-12 National Security Complex, Oak Ridge, Tennessee

Description: This report contains the groundwater and surface water monitoring data that were obtained during calendar year (CY) 2004 at the U.S. Department of Energy (DOE) Y-12 National Security Complex (hereafter referenced as Y-12) on the DOE Oak Ridge Reservation (ORR) in Oak Ridge, Tennessee. The CY 2004 monitoring data were obtained from groundwater and surface water sampling locations in three hydrogeologic regimes at Y-12 (Figure A.1). The Bear Creek Hydrogeologic Regime (Bear Creek Regime) encompas… more
Date: September 1, 2005
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evidence for Groundwater Contamination Vulnerability in California?s Central Valley

Description: The California Water Resources Control Board, in collaboration with the US Geological Survey and Lawrence Livermore National Laboratory, has implemented a program to assess the susceptibility of groundwater resources. Advanced techniques such as groundwater age dating using the tritium-helium method, extensive use of oxygen isotopes of the water molecule ({delta}{sup 18}O) for recharge water provenance, and analysis of common volatile organic compounds (VOCs) at ultra-low levels are applied wit… more
Date: December 13, 2005
Creator: Moran, J. E.; Leif, R.; Esser, B. K. & Singleton, M. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Final Monitoring Plan for the Utica Aquifer-North Lake Basin Restoration Project at Utica, Nebraska.

Description: On March 9, 2001, representatives of the Commodity Credit Corporation of the U.S. Department of Agriculture (CCC/USDA) and Argonne National Laboratory met with representatives from a number of federal and Nebraska state agencies (the wetlands agencies; see Table 1.1) to discuss the CCC/USDA's proposed aquifer remediation and wetlands restoration project at Utica, Nebraska. As part of those discussions, Argonne outlined preliminary recommendations for a long-term monitoring program to verify and… more
Date: October 5, 2005
Creator: LaFreniere, L. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Entrainment of Solvent in Aqueous Stream from CINC V-5 Contactor

Description: Personnel completed a rapid study of organic entrainment during operation of a CINC V-5 contactor under prototypical conditions covering the range of expected MCU operation. The study only considered the entrainment of organic into the strip acid effluent destined for the Defense Waste Processing Facility. Based on this work, the following observations are noted: (1) Concentrations of total organic from the contactor discharge, based upon modifier measurements, in the acid typically averaged 33… more
Date: April 29, 2005
Creator: Fink, S. D.; Restivo, M. L.; Peters, T. B.; Fowley, M. D.; Burns, D. B.; Smith, W. M. Jr. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrogen Generation Rate Scoping Study of DOW Corning Antifoam Agent

Description: The antifoam agent DOW Corning Q2-3183A will be added to waste streams in the Hanford River Protection Program-Waste Treatment and Immobilization Plant (RPP-WTP) to prevent foaming. It consists mostly of polydimethylsiloxane (PDMS) and polypropylene glycol (PPG). These and other minor constituents of the antifoam have organic constituents that may participate in radiolytic and chemical reactions that produce hydrogen in Hanford waste. It has been recommended by The WTP R&T Department recomm… more
Date: September 27, 2005
Creator: Crawford, Charles
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Durability Testing of Fluidized Bed Steam Reforming Products

Description: Fluidized Bed Steam Reforming (FBSR) is being considered as a potential technology for the immobilization of a wide variety of radioactive wastes but especially aqueous high sodium wastes at the Hanford site, at the Idaho National Laboratory (INL), and at the Savannah River Site (SRS). The FBSR technology converts organic compounds to CO{sub 2} and H{sub 2}O, converts nitrate/nitrite species to N{sub 2}, and produces a solid residue through reactions with superheated steam, the fluidizing media… more
Date: July 1, 2005
Creator: JANTZEN, CAROL M.; PAREIZS, JOHN M.; LORIER, TROY H. & MARRA, JAMES C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mesoscale Tank Experiments for Investigating Carbon Tetrachloride Biodegradation

Description: Mesoscale tank experiments were performed to simulate bioremediation of saturated zone carbon tetrachloride (CCl4) originating from a vadose zone carbon tetrachloride source. The mesoscale tank is 2-m wide by 2-m high by 3-m long and was constructed of stainless steel, yielding a total volume of 12 m3. Simulated geology within the tank consisted of two unconsolidated sand layers separated by a clay layer containing variable-sized stainless steel tubes that represented fractures within a consoli… more
Date: June 1, 2005
Creator: Lee, Brady D. & Lenhard, Robert J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Probabilistic performance-assessment modeling of the mixed waste landfill at Sandia National Laboratories.

Description: A probabilistic performance assessment has been conducted to evaluate the fate and transport of radionuclides (americium-241, cesium-137, cobalt-60, plutonium-238, plutonium-239, radium-226, radon-222, strontium-90, thorium-232, tritium, uranium-238), heavy metals (lead and cadmium), and volatile organic compounds (VOCs) at the Mixed Waste Landfill (MWL). Probabilistic analyses were performed to quantify uncertainties inherent in the system and models for a 1,000-year period, and sensitivity an… more
Date: November 1, 2005
Creator: Peace, Gerald L.; Goering, Timothy James (GRAM, Inc.); Miller, Mark Laverne & Ho, Clifford Kuofei
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Emissions Inventory Report Summary: Reporting Requirements for the New Mexico Administrative Code, Title 20, Chapter 2, Part 73 (20.2.73 NMAC) for Calendar Year 2003

Description: Los Alamos National Laboratory is subject to annual emissions-reporting requirements for regulated air pollutants under Title 20 of the New Mexico Administrative Code, Chapter 2, Part 73 (20.2.73 NMAC), Notice of Intent and Emissions Inventory Requirements. The applicability of the requirements is based on the Laboratory's potential to emit 100 tons per year of suspended particulate matter, nitrogen oxides, carbon monoxide, sulfur oxides, or volatile organic compounds. For calendar year 2003, t… more
Date: January 1, 2005
Creator: Stockton, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Parametric Evaluation of an Innovative Ultra-Violet PhotocatalyticOxidation (UVPCO) Air Cleaning Technology for Indoor Applications

Description: An innovative Ultra-Violet Photocatalytic Oxidation (UVPCO) air cleaning technology employing a semitransparent catalyst coated on a semitransparent polymer substrate was evaluated to determine its effectiveness for treating mixtures of volatile organic compounds (VOCs) representative of indoor environments at low, indoor-relevant concentration levels. The experimental UVPCO contained four 30 by 30-cm honeycomb monoliths irradiated with nine UVA lamps arranged in three banks. A parametric evalu… more
Date: October 31, 2005
Creator: Hodgson, Alfred T.; Sullivan, Douglas P. & Fisk, William J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

In-Tank Peroxide Oxidation Process for the Decomposition of Tetraphenylborate in Tank 48H

Description: Tank 48H return to service is critical to the processing of high level waste (HLW) at the Savannah River Site (SRS). Tank 48H currently holds legacy material containing organic tetraphenylborate (TPB) compounds from the operation of the In-Tank Precipitation process. The TPB was added during an in-tank precipitation process to removed soluble cesium, but excessive benzene generation curtailed this treatment method. This material is not compatible with the waste treatment facilities at SRS and m… more
Date: April 19, 2005
Creator: DANIEL, LAMBERT
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tailoring the Interface to Improve Voc in Dye-Sensitized Solar Cells

Description: Adding certain adsorbents in conjunction with the sensitizing dye employed in high-efficiency TiO2 nanoparticle solar cells has been shown to increase the photovoltage. It is has been speculated that the increased photovoltage is due to these hydrophobic adsorbents passivating surface states that mitigate the recombination of photoinjected electrons with redox species in the electrolyte. In collaboration with the DOE Office of Science Program, we are conducting transient-photovoltage measuremen… more
Date: January 1, 2005
Creator: Neale, N. R.; Kopidakis, N.; van de Lagemaat, J. & Frank, A. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improving Indoor Environmental Quality And Energy Performance of Modular Classroom HVAC Systems

Description: The factory-built relocatable classroom (RC) is a dominant force in the school facility construction industry in the US and elsewhere. it is estimated that there are approximately 650,000 RCs currently occupied in the US, housing about 16 million students. RCs receive public attention due to complaints about poor indoor environmental quality (IEQ). Both measured data and anecdotal evidence in California have suggested excessive acoustical noise from heating, ventilation, and air conditioning (H… more
Date: March 1, 2005
Creator: Apte, Michael G.; Spears, Michael; Lai, Chi-Ming & Shendell, Derek G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Potential VOC Deflagrations in a Vented TRU Drum

Description: The objective of the analysis is to examine the potential for lid ejection from a vented transuranic (TRU) waste drum due to pressure buildup caused by the deflagration of hydrogen and volatile organic compounds (VOCs) inside the drum. In this analysis, the AICC pressure for a stoichiometric mixture of VOCs is calculated and then compared against the experimental peak pressure of stoichiometric combustion of propane and hexane in a combustion chamber. The experimental peak pressures of propane … more
Date: April 7, 2005
Creator: Mukesh, GUPTA
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Quantifying object and material surface areas in residences

Description: The dynamic behavior of volatile organic compounds (VOCs) in indoor environments depends, in part, on sorptive interactions between VOCs in the gas phase and material surfaces. Since information on the types and quantities of interior material surfaces is not generally available, this pilot-scale study was conducted in occupied residences to develop and demonstrate a method for quantifying surface areas of objects and materials in rooms. Access to 33 rooms in nine residences consisting of bathr… more
Date: January 5, 2005
Creator: Hodgson, Alfred T.; Ming, Katherine Y. & Singer, Brett C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reduction of Solvent Effect in Reverse Phase Gradient Elution LC-ICP-MS

Description: Quantification in liquid chromatography (LC) is becoming very important as more researchers are using LC, not as an analytical tool itself, but as a sample introduction system for other analytical instruments. The ability of LC instrumentation to quickly separate a wide variety of compounds makes it ideal for analysis of complex mixtures. For elemental speciation, LC is joined with inductively coupled plasma mass spectrometry (ICP-MS) to separate and detect metal-containing, organic compounds i… more
Date: December 17, 2005
Creator: Sullivan, Patrick Allen
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Lattice-Matched GaNPAs-On-Silicon Tandem Solar Cells

Description: A two-junction device consisting of a 1.7-eV GaNPAs junction on a 1.1-eV silicon junction has the theoretical potential to achieve nearly optimal efficiency for a two-junction tandem cell. We have demonstrated a monolithic III-V-on-silicon tandem solar cell in which most of the III-V layers are nearly lattice-matched to the silicon substrate. The cell includes a 1.8 eV GaNPAs top cell, a GaP-based tunnel junction (TJ), and a diffused silicon junction formed during the epitaxial growth of GaNP o… more
Date: February 1, 2005
Creator: Geisz, J. F.; Olson, J. M.; Friedman, D. J.; Jones, K. M.; Reedy, R. C. & Romero, M. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Influence of Selected Liquid and Soil Properties on the Propagation of Spills over Flat Permeable Surfaces

Description: In an effort to determine spill characteristics, information about a spill's spatial distribution with time is being studied. For permeable surfaces, spill phenomenology is controlled by liquid and soil properties, the most relevant of which are presented in this report. The pertinent liquid and soil properties were tabulated for ten liquids and four soils. The liquids represented an array of organic compounds, some of which are or are soon to be documented in the liquid spectra library by the … more
Date: February 15, 2005
Creator: Keller, Jason M. & Simmons, Carver S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bandgap Engineering in High-Efficiency Multijunction Concentrator Cells

Description: This paper discusses semiconductor device research paths under investigation with the aim of reaching the milestone efficiency of 40%. A cost analysis shows that achieving very high cell efficiencies is crucial for the realization of cost-effective photovoltaics, because of the strongly leveraging effect of efficiency on module packaging and balance-of systems costs. Lattice-matched (LM) GaInP/ GaInAs/ Ge 3-junction cells have achieved the highest independently confirmed efficiency at 175 suns,… more
Date: August 1, 2005
Creator: King, R. R.; Sherif, R. A.; Kinsey, G. S.; Kurtz, S.; Fetzer, C. M.; Edmondson, K. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High Efficiency Narrow Gap and Tandem Junction Devices: Final Technical Report, 1 May 2002--31 October 2004

Description: The work described in this report uses a modified pulsed plasma-enhanced chemical vapor deposition (PECVD) technique that has been successfully developed to fabricate state-of-the-art nc-Si materials and devices. Specifically, we have achieved the following benchmarks: nc SiH device with an efficiency of 8% achieved at a deposition rate of {approx}1 A/s; nc SiH device with an efficiency of 7% achieved at a deposition rate of {approx}5 A/s; large-area technology developed using pulsed PECVD with… more
Date: March 1, 2005
Creator: Madan, A
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Environmental transport and fate of endocrine disruptors from non-potable reuse of municipal wastewater

Description: This project was designed to investigate the important but virtually unstudied topic of the subsurface transport and fate of Endocrine Disrupting Compounds (EDCs) when treated wastewater is used for landscape irrigation (non-potable water reuse). Although potable water reuse was outside the scope of this project, the investigation clearly has relevance to such water recycling practices. The target compounds, which are discussed in the following section and include EDCs such as 4-nonylphenol (NP… more
Date: November 16, 2005
Creator: Hudson, B; Beller, H; Bartel, C M; Kane, S; Campbell, C; Grayson, A et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sorption of Organic Gases in Residential Bedrooms and Bathrooms

Description: Experiments were conducted to characterize organic gas sorption in residential bedrooms (n=4), bathrooms (n=2), and a furnished test chamber. Rooms were studied ''as-is'' with material surfaces and furnishings unaltered. Surface materials were characterized and areas quantified. Experiments included rapid volatilization of a volatile organic compound (VOC) mixture with the room closed and sealed for a 5-h Adsorb phase, followed by 30-min Flush and 2-h closed-room Desorb phases. The mixture incl… more
Date: January 5, 2005
Creator: Singer, B. C.; Hodgson, A. T.; Hotchi, T.; Ming, K. Y.; Sextro, R. G.; Wood, E. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

An Improved Analytical Approach to Determine the Explosive Effects of Flammable Gas-Air Mixtures

Description: The U.S. Department of Energy (DOE) Complex includes many sites and laboratories that store quantities of low-level, solid nuclear waste in drums and other types of shipping containers. The drums may be stored for long periods of time prior to being transported and final dispositioning. Based on the radioactivity (e.g., Pu{sup 239} equivalent), chemical nature (e.g. volatile organic compounds) and other characteristics of the stored waste, flammable gases may evolve. Documented safety analyses … more
Date: November 10, 2005
Creator: Yang, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Compatibility and Outgassing Studies for Directed Stockpile Work (FY05)

Description: Compatibility and outgassing studies of non-nuclear materials were carried out in support of the W80 Life Extension Program. These studies included small-scale laboratory experiments as well as participation in Sandia's Materials Aging and Compatibility test (MAC-1). Analysis of the outgassing signature of removable epoxy foam (REF) revealed unusually high levels of volatile organic compounds in the material. REF was replaced with the polyurethane PMDI. Laboratory compatibility tests of high pr… more
Date: November 23, 2005
Creator: Alviso, C; Harvey, C & Vance, A
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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